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Hobart used to make a .02X flux cored wire at one time IIRC, but they don't anymore. You're not going to find any self-shielded wires smaller than .030 commonly available. And frankly, I fail to see a use for fluxcored wire that small to begin with.

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My local welding co said it did exist, but they dont carry it any more i figured i ask here theres gotta be some still floating around, my mig is an old school cheapie century no option to run gas to it and im doing some sheet metal repair on the wayfarer and thought maybe id score some for this , when I have a buddy over to help hold i just use the tig, but some things just require 1 hand i usually just point and shoot with the mig to tack in and then go over with tig or light stick. thanks anyway guys.

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I've used a Ccentury MIG with 0.030" flux core for sheet metal. You need to be quick on the trigger and have some copper backing the tack to pull the heat out, but it works. Check my '54 resto thread in my sig line to see the results - all the welds are done on a 110V Century 80G welder using 0.030" flux core.

IMHO, just go and spring for a MIG machine and then use some 0.023/0.025 solid wire with C25. Even a 'little' 120V unit has more than enough ooomph to run 0.023/0.025 wire and C25 on sheet metal. Maybe not the duty-cycle to run it constantly (production setting or body shop), but with sheet metal it is as much of a 'dance' to keep the heat (and thus warping/distortion) down as it is to put the heat in to weld the sheetmetal together.

well i just bought the .030 today and had at it on my door, not bad couple of burn holes but i just tacked it every few inches and than went to other side not bad will look good when im done thks guys.